Allow ipv6 ECMP in devstack
It turns out that a host can have multiple valid default gateways,
something that's not common in ipv4.
This patches add supports for multiple default gateways in ipv6
environments.
Closes-Bug: #1786259
Change-Id: I30bf655f7160dd19c427ee79acdf145671a3e520
Signed-off-by: aojeagarcia <aojeagarcia@suse.com>
diff --git a/lib/neutron_plugins/services/l3 b/lib/neutron_plugins/services/l3
index 9be32b7..ec289f6 100644
--- a/lib/neutron_plugins/services/l3
+++ b/lib/neutron_plugins/services/l3
@@ -103,7 +103,7 @@
default_v4_route_devs=$(ip -4 route | grep ^default | awk '{print $5}')
die_if_not_set $LINENO default_v4_route_devs "Failure retrieving default IPv4 route devices"
-default_v6_route_devs=$(ip -6 route | grep ^default | awk '{print $5}')
+default_v6_route_devs=$(ip -6 route list match default table all | grep via | awk '{print $5}')
function _determine_config_l3 {
local opts="--config-file $NEUTRON_CONF --config-file $Q_L3_CONF_FILE"
@@ -395,6 +395,10 @@
# This logic is specific to using the l3-agent for layer 3
if is_service_enabled q-l3 || is_service_enabled neutron-l3; then
+ # Ensure IPv6 forwarding is enabled on the host
+ sudo sysctl -w net.ipv6.conf.all.forwarding=1
+ # if the Linux host considers itself to be a router then it will
+ # ignore all router advertisements
# Ensure IPv6 RAs are accepted on interfaces with a default route.
# This is needed for neutron-based devstack clouds to work in
# IPv6-only clouds in the gate. Please do not remove this without
@@ -405,8 +409,6 @@
# device name would be reinterpreted as a slash, causing an error.
sudo sysctl -w net/ipv6/conf/$d/accept_ra=2
done
- # Ensure IPv6 forwarding is enabled on the host
- sudo sysctl -w net.ipv6.conf.all.forwarding=1
# Configure and enable public bridge
# Override global IPV6_ROUTER_GW_IP with the true value from neutron
IPV6_ROUTER_GW_IP=$(openstack --os-cloud devstack-admin --os-region "$REGION_NAME" port list -c 'Fixed IP Addresses' | grep $ipv6_pub_subnet_id | awk -F'ip_address' '{ print $2 }' | cut -f2 -d\' | tr '\n' ' ')